Lamp-socket.



strATEs- OFFICE.

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or nsraomjxmmow, a:

IQQRPORTION OF HICHIGAN.

spanie-mnei tmin mm. Patented Mar. 3, 1914. awiu-uw iiiza ma ie, ma. 'hi-iii m. 718.888.

To all wlicza 'i't may co'n-cern Be it known that .I, CirAiiLrs E. Goiiuzi',

'a' citizen of the United States of America,

residing at Detroit, in tlie county of Wayne and State of Michigan, have invented certafn new and useful Improvenients in Lam -Sockets, 'of which the following is a sfieci cetion, reference being had therein to t e accompanying drawinis. I

The iaveation relatesto amp sockets and consists in the'provision of a simple but stilcient device for focusing tlie illuminent in relation to the retiector; in the rovision of .'a socket which will avoid un ue twisting of the wires connected to the socket during focusing of the .illuininant; in a structure by which the parts will be locked in their adjusted osition against accidental :novement; an further iii certain coinbinations, arrngements and constructions of parts 'as will more fully hereinafter appear and as claimed.

In the drawings,-Fi gure 1 is an enlarged, lon itudinal section through ii portion.of a anip with 'the iinproved socket applied thereto; Fig. 2 is an enlarged, pers ective view of ii socketFig. 3 is a front e evation thereof, Fig. 4 illustrates ii modification; and Fig. [i is a cross section through the coil spring.

Myiniproved construction of socket is composed of a plug A, a bearing B and a coniiection between theplug end beiiring which will' effect ii com aratively large, longitudinnl adjustnient o the plug upon a compiii'atively slight relative rotiir movemeiit between the latter and the iiring. Prefcrnbly the bearing B ie formed of a cylindrical slceve fixedly secured to a stationary part' of the lamp and alining with an openin, in the rellectoi'.I In the construction il ustrated the member B is rigidly attached to the reflector C and the opening of the sleeve alines with an openin D at the apcx of the rcflector. The plug ias a bod portion arraiiged within the hearing B un this body poi'tion is preferably fornied b a metallic slceve E of a size to nicely fi: the beiii'ing butl free to turn thcrein. The forward end of the sleeve forms the socket proper for receiving the lamp. and is provided with hag'onet slots G for engagiu the liigii on t e lamp bulb, iii the usua manner.

Apara tivel and a spira gitudiniilly extending J thereof projectin into the lamp bulb eiiaging portion an providedwith shanks positioned within spaced bores L of nn insuhiting member or core. The liittei' has afortion M arrangcd within the sleeve E an seciired thereto'against relative rotary or lon itudinal moveiiient as by a pin O, and is a so rovided with an extension P without the s eeve.

Q are openings or bores in the extension P alinin with the bores L, and R are connectors or the leads' S T ari'anged within the openin Q' and attached to the shanks K,'tlie lea s passing into en agemeiit withtlieir respective connectoi's tiroiigh radial recesses-or chambers U forined in the extension P. In order to facilitate the ad-- justnient of the plii theportion P is preferablyenlarged an shaped to form a button or knob, as shown. Since the leads S T will turn with the pluA upon rotative edjustmen't thereof, as' efore stated, the connections between' the' plug and its bearing is such as to effect ii coin iiratively large longitudinal travel of the p ug upon a .comslight rotation thereof` In the preferre form .the connection coiiiprises ii pin V upon one of the members, hcreiii iihownl iii-i ii ion the sleeve li) of the plug, uide or slotlW in the other. The pitch of t ie guide W iiiay be, and preferably is such tliiit less tliun a quarter tui'ii of the plug will movethe liittei' loiigitucliiially .suflicieiit for all ordinar al"iistmente` to bring'the'illuminant'iiiio ocus withthe retiector.

After the plii has bcc.. iiioved to its adjusted position it is locked in such position against acciclentiil moi-einem. With the construction illustrated in Figs. 1 to 8 inclusive, the iileeve E hus the oiiter face thereof provided with a'-plui'ality of closely spaced loncorrugations` the grooves' of wliich ai'e adapted to he enigcd by a pawl B' upon the oiiter face of t esleeve B and having a point I)' extending through a slot. F' in the sleeve B hito enfgagement witlithe corrugatioiis of the memicrF.. This pawl is yieldably i'essed iiiward by means of a leaf-s i'ing of semioirculai' configuration nm having one end provided with a liiteral lug'or flaiige H' enagina recess I' in the slecve B and havin t ero er end extendin over the pawl B t K' are eel'e extent iiig outwiir ly from shown in Fi 2, when the parts are as- 'port-ion in operative relation to the re ector,

i'ue'nt of loeliugjdevice also s'ervesfthe. ad

'and 5 comprises an aunular coil-spring L' a ga inst la tei'al (lisplaeement.l 2:1.:1Thisfi farranetional purpose of yieldably]holding'th'e plug against the inne'rfaceof the sleeve vopposite the' locking-pawl, .thercby 'preventing' rattliiig between tlie plug and its bea'rini` 'r The locking device illustratcd in igs. 4

arran d within a. housing M' formed at the rear o the bearing or sleeve B. The'coils of the spring enga e tlie corrugations on' the plug and yielda ly lock the latter`to the sleeve. In both-locking devices, while the plug is locked in its adjusted position against displacement by jarring or any other strains which the parts are normally subjected to, the resilient lccking members care such as to allow the plu to be readily rotated by hand wlien it is e'sired to focus the illuminant.

With the construction so far described,as

sembled, the amp bulb engagin portion of the plug projects slightly into t e reflector and the adjustin knob P is at the rear of the refiector. If it is desired to focus the filament of the lamp bulb it is merely necessary to turn the knoh P byt'hand, which will move the bulb longitudinallv in the reflector, and when the tilament lias beenfocused, the looking means autolatically secures the plug against accidental movement.

What I claim as my invention is:

1. The combination with a reflector of a lamp, of a plug having a lamp-bull) en aging ortion formed as a unit therewit a terminal carried by the plug and extending into opei'ative relation to the lamp-bulb engagin poi'tion, a lead'engaging connector carrie by the i'ear end of the lug and electrically connected to said terminal, a bearing for the plug ai'ranged to position the lampbulb engugmg portion in operative relation to the reflccioi', and a connection between the hearing and the lug for adjusting the plug in relation to t ie reflector, comprisin a .spiral guide upon the one and a projection upon tlie other engagin the guide, said guide having a steep pitc i wherehy a relative i'otation between t ie plug and the hearing of hut a portion of a revolution will effect a compurativcly large longitudinal udjustn'ient o the plug.

2. The combination with a i'eflector of a. lamp, of a plug having a lamp-bulb en aging poi'tion foi'ined as a unit therewiti, a terminal carried by the plug and projecting into operative relation to the lamp-bulb engagiug portion, a lead-engaging connector carried by the rcar end of the plu and cleotrically connected to said termina a sleeve within which said pxlug is arranged, positioned to ari'ange t, o lamp-bull: en aging f ;t e'plugin the sleeve, comprising Jection upon the one and a s iiralguide upon' .andaiconnection,between the sleeve and the plu Ffor efl`ecting a-` longitudinal adjustment a pro.-

thevother with, which saic proJection engages, said spiral guide haviiiga steep pitch whereby a i'elative ro'tation between the sleeve and lug of hut a portion of a revolution will e ect a couiparatively large longitudinal travel of the plug witliin the sleeve.

3.'The combination with a reflector, of a lamp socket comprising a' plug having a lamp-bulb engagin poi'tion .formed as a unit therewith, a s eeve within which said plug is arranged, positionedlto arrange the anip-bulb engaging portion in operative relation to the i'eflectoi', and a.connection bet'ween the sloeve aiid the plu longitudinul add'ustment of t e plug in re ation to the re ector' upon i'otation of the plug, said plug having a portion projecting reai'wardly of the sleeve forming a means by which the plug may be turned.

4. The combination with a reflector, of a lamp socket comprising a plug liavin a lainp-bulb en agiug portion, a s eeve wit in which said lug is ai'rauged, positioned to art'alnge the amp-bulb engaging portion iii opei'ative relationto the reflector, and a connection bctw'een the sleeve and the plug for eli'ecting a longitudinal adjustment o the plug in relation to the reflector' upon rotation of the plug, said plug having an adjusting knob at the reai' end thereof.

5. The combination with a reflector of a lamp socket comprising a 'plug having a lamp bulb engaging portion, a s eeve within which said plug is arranged, positioned to arrange thelamp-hulb engaging portion in operative relation to the reflector and a connection between the sleeve and the plug for efl'ecting a longitudinal adjustment o the plug in'relation to the relector upon rotation of the plug, said plug having a ortion projecting reai'wai'dly of the sleeve ormin a means y which the plug may be turne and lead-engagnig eonnectors carried by said rearward proJeetion.

6. The combination with a reflector, of a lamp socket comprising a plug havm a lamp-bull) engaging portion)` a sleeve wit in which said plug is arranged, positioned to arrange the lamp-bulb engaging portion in operative relation to the refleetor and a conncction between the sleeve and the plu for efl'ecting a longitudinal adjustment 0% the plug in relation to the reflector upon rotation of the plug, said plug having an adjusting.` knob at the rcar end thereof pro- 'vided with spaced chambers opening through periphery thereof, and wires extending iito said chambers and connected to the u p '{.gThe combination with a reflector of a lamp, of a lplug having a lamp-bulb engaging portion, a bearing for the plug arranged to position the lamp-bulb engaging portion m operative relation to the reflector, a connectlon betyveen the bearin and the plug for adjuitingl the plug in re ation to the re- {iector,; a;iljconnection efl'ecting a com arativelylI large'ilongitudinal movement o the plug liipon a comparativel" slight relative rotary movement of the fiug and bearing, and means for securing t e plug and bearing against relative rotary movement comprising a spriug-presed pawl carried by the one and udapted to enga e the other.

8. The combination with a reflector of a lamp, of a plug having a lamp-bulb engaging portion, a bearing for the plug arranged to position the lamp-bulb engaging portion in operative relation to the reflector, a connection between the bearin and the plug for adj usting the plug in re ation to the reflector, said connection efl'ecting a comparatively large longitudinal movement of the plug upon a comparativel slight relative rotary movement of the p ug and bearing, and means carried by the bearing having a resilient engagement with the outer face of the plug and adapted to releasably lock the latter in its different positions of adjustment. i

9. The combination with a reflector, of a lamp socket comprisring A a sleeve fixedly mounted in relation to t e reflector, a plu arranged within said sleeve and prov1de with a lamp-bulb' ,engaging portion positioned in operative relation to the reflector, a pin and spiral groove engagement between the plug and sleeve, the outer face of the plug bemg provided with a plurality of closely spaced corrugations, and a s ringpressed pawl carried by the sleeve a a ted to en ge the corrugated surface of the p ug, fort e urpos'e described.

10. T e combination with a reflector, of a lamp socket comprisin a sleeve fixedly mounted in relation to t e reliector, a plug arran ed within said'sleeve and having a lampulb engaging portion positioned in operative relation to the reflector, the outer surface of said sleeve being provided with a plurality of longitudinally-extendin corrugations, a connection between the p ug and sleeve, comprising a projection upon the one und a. spiral guide upon the other, with which said projection engages, a pawl carried by the sleeve and positioned to engage said corru ations, and a. leaf spring clamped ovex` said s eeve and engaging the pawl..

11. The combination With a reflector, of a plug liavin a lam -bulb engaging portion` a bearing vor the p ug arranged to position the lamp-bulb enga 'ng portion in operative relation to the re ectqr, aconnection between the bearing and plug eifecting a comparativel large longitudinal movement of the latter upon a comparatively slight relative rotary movement of the lug and bearing on udjusting the lampulb engagi'ng4 portion relative to the refiector, and resilient means for securing *the plug and bearing against relative rotary movement, serving to yieldably maintain theY plug and bearing in contact.

12. The combination with a reflector, of a lamp socket comprising a plug having a lnmp-bulb engaing portion a sleeve connected to the re eotor and within which the plug is arranged, a'connection between the sleeve and plug for eifectinga comparatively large longitudinal adjustment of the plug in relation to the sleeve upon a comparatively slight rotation of the plug, comgrising a projection u on the one and a spiral guide upon -the ot er with which said projection enga es, and resilient means for securing the p ug and bearing against relative rotary movement, serving to maintain the' 00m o! M ,atut na, bo obtained tor lv. ati each, by oddania' the Oommimoaer of Patenta. Washington, D. 0. 

